ORIGINAL: neilmot
Has anyone experienced a problem with the alpha 40's engine stalling when going from idel to full thorttle? We have a few new planes at our club with the same problem... The engines start instantly and even after a warmup with the glow batt the engine often stalls during the transition from idel to full. We have tried all the limited needle settings for LS and HS. If it were just 1 plane we would understand but it's at least 3 and 1 is a P51 PTS with the same .46 engine... We can get the planes flying but above half throttle. they sometimes stall on touch and goes... We have gone past the needle limits to get them to fly
Any ideas?
BTW the plane is a great trainer! Flys well. Very simple...
Neil
Stalling when advancing the throttle like that indicates that the low speed needle is too lean.
Adjust it to be a bit richer.
Also check to see that the needle is not "walking" as the Evolution engines are prone to do. You can cure this by placing a bit of exhaust tubing over the needle and clip.
Walking and the limiters not permitting you to make that "perfect" adjustment are what most people have problems with, concerning these engines.
Fix that and they are great.